Here are the other logo ideas Google scrapped before deciding on the new one

"Google has changed a lot over the past 17 years — from the range
of our products to the evolution of their look and feel," the
company wrote in the caption for a YouTube video introducing the
new logo.

Although the logo change seems simple, the company gathered
designers from all across the country to meet in New York for a
"week long design sprint," the company says in
a post on its design blog. But before Google decided on its
new look, it went through a few other logo choices.

Here's an image of some that didn't make the cut, which Google
posted on its design blog:

You'll notice Google experimented a lot with Material
Design, the new type of design language Google introduced in the
previous version of Android that emphasizes bold colors. The
company also played with multicolored letters too.